After the attack she was dragged out of the water by her friends.
She remained calm after the attack.
"She was conscious the whole time, but had a pretty good gash on her leg. There wasn't a tonne of blood, obviously it wasn't an arterial bleed," Smart said.
Porpoise Bay in Southland, where the woman was bitten by a shark. Photo / File
In 2014 a surfer was bitten three times, reportedly by a great white, while he was surfing at Porpoise Bay, near Curio Bay.
Surfer Darren Mills, 28, punched the shark away. Mills suffered three deep gashes between his thigh and his calf as the shark latched on to his leg while he sat on his surfboard 50m offshore.